Set same icon for all my Forms

public MyCustomForm()
{
    Icon = GetExecutableIcon();
}

public Icon GetExecutableIcon()
{
    IntPtr large;
    IntPtr small;
    ExtractIconEx(Application.ExecutablePath, 0, out large, out small, 1);
    return Icon.FromHandle(small);
}

[DllImport("Shell32")]
public static extern int ExtractIconEx(
    string sFile,
    int iIndex,
    out IntPtr piLargeVersion,
    out IntPtr piSmallVersion,
    int amountIcons);

public new Form Owner {
    set {
        this.Icon = (value == null ? null : value.Icon);
        base.Owner = value;
    }

    get {
        return base.Owner;
    }
}

form.icon = MainFrom.Icon

Icon = MainFrom.Icon